Supporting frame for instruments of radio sets



Oct. 30, 1928.

G. v. HEDSTROM -$UPPORTING FRAME FOR INSTRUMENTS OF RADIO SETS Filed Nov. 14, 1925 r. moi 4351 @n v )1 i awww x WW T EMQ Oct. 30, 19 28. 1,690,065

G. V. HEDSTROM SUPPORTING FRAME FOR INSTRUMENTS OF RADIO SETS Filed Nov.l4, 1925 3.Sheet s-Sheet 2 G. V. HEDSTROM v Oct so, 1928.

SUPPORTING FRAME FOR INSTRUMENTS OF RADIO SETS Filed Nov. 14, 1925 5 Sheets-Sheet 3 Patented Oct. 30, 1928 UNITED STATES GUSTAV V. HEDS'I ROM, OF KENUSHi'i, WISCONSIN.

S'Ui'PORTIN'G FRAME FOR IBTSTRUMENTS OF RADIO SETS.

Application filed November This invention relates to a frame adapted to support the parts or instruments forming a radio receiving set or the like, particularly for the super-heterodyne, tuned radio-frequency andsimilar circuits.

It is aimed to provide a. novel construction in which the parts may be readily interchanged, replaced, and new parts according to the progress and development of the art substituted 'forpresent ones; to provide a construction which is exceedingly compact; to

provide 'a Construction in which the parts are.

mounted vertically, the instruments of each kind preferably being grouped, and most of the wires being arranged that they may fall'ben'eath or behind the framework; a construction centering around relatively long main elements so as to give the structure a stream line effect and onesurprisingly neat and attractive. I V

One operative embodin'ient is shown, com panying drawings, wherein:

Figure 1 is a fragmentary view in horizon tal longitudinal section;

Figure 2 is a cross sectional view taken on the line 22 of Figural; V V

Figure 3 is a cross sectional View taken on the line 3 3 of Figure 1 p Figure 4 is a cross sectional View taken on theline of Figure 1;

F'gure 5 is'a cross sectional view on the line 55 ofl igure 1;

in ac- Figure (Sis a perspective view of one of the audio transformer supporting brackets, and

Figule 7 is a perspective view of one of the main supporting brackets. I

Referring specifically to the drawings, wherein like reference characters designate like or similar parts, a conventional cabinet is shown as at A having a panel B at its front, of suitable insulating material, preferably bakelite. Bolts lO are-detachably connected to the panel and interiorly of the cabinet mount a pair of condensersupporting bars 11, of insulating material such as bakelite and which"are spaced from the panel B as by sleeves 12 surrounding said bolts 10. Any suitable number of conventional condensers 13 are fastened by means of screws 14 detachand carried by the spindle 16 of the central 14, 1925. Serial No. 69,063.

condenser which is journaled in the panel B. The spindles 17 of the other condensers have cranks 18 connected by pitmen 19 to crank 18 carried by the spindle 16 so that a turning of the knob 15 will be imparted sin'iultaneously to the proper parts of each of the con densers 13.

Secured to the lowermost bar 11 area plurality of main supporting brackets 20 of the specific construction shown in Figure 7. Such brackets at the front end have upturned lugs 21' provided with openings therethrough for engagement preferably, with the bolts 10 aforesaid passing through said lower bar 11. Bracket 20 has elongated slots 23 and 24 provided longitudinally thereof and braces 25 are connected as to bolts 26' of certain of the condensers and such braces25 have their lower ends extended adjustably throu theslots 2d and secured thereto by nuts 27 engaging the upper and lower surfaces of said brackets.

Disposed longitudinally of the cabinet are Ill.

tened to the plates 28 and '29, each socket pref I erably carrying two bolts 34, one at each side thereof, and passing through clamping plat-es 35 adapted to bridge the under surfaces of the plates and be clamped thereto by the bolts 34 so that the sockets may thus be adjustahly secured in place. The plates 28 and 29 of course may be shaped to accommodate odd sockets and for instance that directly in line with the intermediate condenser, such socket having its securing bolts 34 arranged on a line at a right angle to the lines of the socket secured by plates 35 and passing through elongated slots 33 of said plates. Other socket-s may have the bolts 34 simply passing through openings or longitudinally elongated openings of said plates. Said plates 28 and 29 are of insulation, preferably bakelite.

Plate 28 is wider than plate 29 and supports thereon a plurality of radio frequency transformers of conventional form and designated 36, having bolts 37 securing them to the plate 28. Said bolts also pass through a terminal bar 38 clamped by the bolts on top of the radio frequency transformers 36. The

bar 28' carries suitable terminals or binding posts as at 39 for connection to the antenna, ground, and the A and B batteries. Two audio transformers are shown as at 40 and are supported from one of the brackets 20 in laterally offset relation thereto as best shown'in Figures 1 and 4. This end is accomplished by brackets 41 generally of L-shape having lugs 42 at one end bolted as at 43 to the plate 29. The main arm of the bracket 41 is elevated and has elongated slots 44: therethro ugh so that bolts 45 may connect the audio transformers adjustably thereto. Spacing sleeves -16 may surround such bolts 45.

The main switch 47 may also be mounted on the front panel B.

\Vhere the various bolts or screws are used to secure the instruments or parts together, it will be understood that they are readily removed and that holes are provided in the supporting parts to accommodate them and that such holes are generally enlarged or elongated.

Furthermore the sockets being supported by spaced frames provides for rapid and neat assembly thereof and of the plates 28 and 29 constituting a sub-panel; also that the sup ports for the condensers provide for accurate spacing of these instruments and for expeditious assembling thereof; also that the means for supporting the transformer coils 36 makes for rigidity thereof and for ease in removal and replacement and for the highest electrical efliciency thereof; and that the means for mounting the audio transformers, said means comprising the vertical alinement thereof, makes for compactness in arrangement.

As a result, the parts may be interchanged, removed or replaced and new parts, according to up-to-date discoveries may be substituted into the device for the existing ones and Where they vary as to size or connections, the particular adjustment and adaptation of the parts enable the same to be readily secured. The construction enables any standard make or design of instruments to be used and still be accurately spaced by the adjustable plates 28 and 29 so as to allow the use of a single control from knob 15. The construction further is of stream-line effect, the instruments are protected against jars and shocks or vibration as Well as against short circuits and by reason of their elevation, the units are sub stantially dust-proof.

Various changes may be resorted to provided they fall within the spirit and scope of the invention.

I claim as my invention 1. Radio apparatus comprising a panel, spaced bars supported on-said panel in the rear thereof and relatively close thereto, condenser means connected to said. bars, fastening elements securing said bars to the panel, brackets secured to one of said bars by certain of said fastening OlCll'lOIltf-f; and extending rearwardly of the bars and condenser, and spaced socket-supporting plates on said brackets.

2. Radio apparatus comprising a panel, spaced bars supported on and relatively close to said panel, condenser means connected to said bars, fastening elements securing said bars to the panel, brackets secured to one of said bars by certain of said fastening elements and extending rearwardly of the bars and panel, said brackets having elongated slots spaced socket-supporting plates on said brackets having securing elements engaging certain of said slots.

Radio apparatus comprising a panel, spaced bars supported on and relatively close to said panel, condenser means connected to said bars, fastening elements securing said bars to the panel, brackets secured to one of said bars by certain of said fastening elements and extending rearwardly of the bars and panel, said brackets having elongated slots, spaced socket-supporting plates on said brackets having securing elements engaging certain of said slots, and braces engaging other of said slots and connected to saidcondensers.

4. Radio apparatus comprising a panel, spaced bars supported on and relatively close to said panel, condenser means connected to said bars, fastening elements securing said bars to the panel, brackets secured to one of said bars by certain of said fastening elements and extending rearwardly of the bars and panel, said brackets having elongated slots, spaced socket-supporting plates on said brackets having securing elements engaging certain of said slots, and supporting brackets for additional parts extending laterally from one of said first mentioned brackets and having bolts engaging certain of the elongated slots thereof.

In testimony whereof I affix my signature.

GUSTAV V. HEDSTROM. 

